what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Ulcers also can be associated with other diseases, particularly connective tissue diseases such as lupus or BehÃ§et's syndrome, which cause symptoms on the eyes and genitals as well as the mouth. There can be one or many ulcers at the same time, and they are recurrent, which means they keep returning.